package com.atguigu.gulimall.ware.config;

import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.Exchange;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.TopicExchange;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * <p>Title: MyRabbitConfig</p>
 * Description：
 * date：2020/7/3 19:41
 */
@SuppressWarnings("all")
@Configuration
public class MyRabbitConfig {


    /**
     * 第一次执行时，rabbitMQ中无队列。可以开启这个方法
     * 创建完成后得关掉，否则影响正常业务
     */
//	@RabbitListener(queues = "stock.release.stock.queue")
//	public void handle(){
//
//	}

    /**
     * 消息转换器
     */
    @Bean
    public MessageConverter messageConverter() {
        return new Jackson2JsonMessageConverter();
    }

    /**
     * String name, boolean durable, boolean autoDelete, Map<String, Object> arguments
     */
    @Bean
    public Exchange stockEventExchange() {

        return new TopicExchange("stock-event-exchange", true, false);
    }

    /**
     * String name, boolean durable, boolean exclusive, boolean autoDelete, @Nullable Map<String, Object> arguments
     */
    @Bean
    public Queue stockReleaseQueue() {
        return new Queue("stock.release.stock.queue", true, false, false);
    }

    @Bean
    public Queue stockDelayQueue() {

        HashMap<String, Object> arguments = new HashMap<>();
        arguments.put("x-dead-letter-exchange", "stock-event-exchange");
        arguments.put("x-dead-letter-routing-key", "stock.release");
        // 消息过期时间 2分钟
        arguments.put("x-message-ttl", 120000);

        return new Queue("stock.delay.queue", true, false, false, arguments);
    }

    /**
     * 交换机和延迟队列绑定
     */
    @Bean
    public Binding stockLockedBinding() {
        return new Binding("stock.delay.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.locked",
                null);
    }

    /**
     * 交换机和普通队列绑定
     */
    @Bean
    public Binding stockReleaseBinding() {
        return new Binding("stock.release.stock.queue",
                Binding.DestinationType.QUEUE,
                "stock-event-exchange",
                "stock.release.#",
                null);
    }
}
